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Result : Searchterm 'Noise' found in 12 terms [] and 72 definitions []
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Searchterm 'Noise' was also found in the following services: 
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News  (14)  Forum  (13)  
 
Unshielded Electric Components
 
Unshielded electric components in the magnet room will excite RF noise artifacts (interference) in different variations. RF 'buzz' will be seen over a range of frequencies on the images. The artifact runs in frequency encoding direction.
mri safety guidance
Image Guidance
Take care to use only MR compatible (special shielded) devices.

See also MR Compatibility.
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Further Reading:
  News & More:
Electrical Noise in Intraoperative Magnetic Resonance Imaging reveals the intricacies of human brain ā€“ integrated consciousness with connectors to chilled universe
Sunday, 18 January 2009   by www.indiadaily.com    
Searchterm 'Noise' was also found in the following services: 
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Radiology  (15) Open this link in a new windowUltrasound  (15) Open this link in a new window
Vantageā„¢InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
http://www.medical.toshiba.com/clinical/radiology/vantage.htm From Toshiba America Medical Systems Inc.;
With its high-field strength, the Vantageā„¢ delivers the clinical capabilities and image quality expected by cardiologists, while simultaneously offering patients a more comfortable and non-invasive option, said Dane Peshe, director, MRI Business Unit, Toshiba America Medical Systems. Vantageā„¢ supports a full complement of cardiovascular imaging studies, ranging from stroke evaluation to peripheral vascular imaging. Additionally, the ultra short bore design offers patients a greater feeling of openness that reduces claustrophobic sensations, while Toshiba's exclusive, patented Pianissimoā„¢ technology reduces scan noise by as much as 90 percent for a more pleasant experience.'
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Ultra short bore
SYNCHRONIZATION
ECG/peripheral, respiratory gating
PULSE SEQUENCES
SE, FE, IR, FastSE, FastIR, FastFLAIR, Fast STIR, FastFE, FASE, EPI, SuperFASE; Angiography: 2D(gate/non-gate)/3D TOF, SORS-STC
IMAGING MODES
Single, multislice, volume study
50 cm
Up to 1024
MEASURING MATRIX
32-1024, phase;; 64-1024, freq.
PIXEL INTENSITY
256 gray levels
65.5 cm
H*W*D
? x ? x 149.5 cm
POWER REQUIREMENTS
380/400/415/440/480 V
COOLING SYSTEM TYPE
Closed-loop water-cooled
Liquid helium: approx. less than 0.05 L/hr
STRENGTH
30 mT/m
Passive, active, auto-active
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• View the DATABASE results for 'Vantage™' (2).Open this link in a new window

 
Further Reading:
  Basics:
Toshiba Receives FDA Clearance for Vantage Titan MR System
Monday, 28 January 2008   by www.businesswire.com    
MRI Resources 
Journals - Veterinary MRI - General - NMR - Coils - MRA
 
Volume Imaging
 
Imaging techniques in which NMR signals are gathered from the whole object volume to be imaged at once, with appropriate encoding pulse RF and gradient sequences to encode positions of the spins. Many sequential plane imaging techniques can be generalized to volume imaging, at least in principle. Advantages include potential improvement in signal to noise ratio by including signal from the whole volume at once; disadvantages include a bigger computational task for image reconstruction and longer image acquisition times (although the entire volume can be imaged from the one set of data). Also called simultaneous volume imaging.
 
Images, Movies, Sliders:
 Knee MRI Transverse 001  Open this link in a new window
 
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• View the DATABASE results for 'Volume Imaging' (7).Open this link in a new window


• View the NEWS results for 'Volume Imaging' (4).Open this link in a new window.
 
Further Reading:
  News & More:
3D-DOCTOR Tutorial
   by www.ablesw.com    
4D-Fueled AI with DCE-MRI Improves Breast Lesion Characterization
Friday, 26 February 2021   by www.diagnosticimaging.com    
Searchterm 'Noise' was also found in the following services: 
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News  (14)  Forum  (13)  
 
Volumetric Imaging
 
Volumetric imaging is a 3D technique where all the MRI signals are collected from the entire tissue sample and imaged as a whole entity, therefore providing a high signal to noise ratio. The acquisition of isotropic voxels or thin slices with high spatial resolution allows to create multiplanar reconstructions in all planes; a compensation for the usually longer scan time. The acquisition time can be reduced by parallel imaging technique.
New T2 weighted variants of 3D sequences (FSE-XETA, T2-SPACE, VISTA) have been introduced that differ from conventional FSE sequences. An echo train containing up to 200 echoes obtained at a minimum echo spacing allows very fast acquisition. A flip angle modulation (flip angle sweep - FAS) during the FSE readout carries magnetization as long as possible to avoid blurring and provide optimal signal at the effective echo time. This type of imaging is well suited for brain and spine MRI procedures.
Newer T1 weighted variants include Liver Acquisition with Volume Acquisition (LAVA) and T1W High Resolution Isotropic Volume Examination (THRIVE), which have advantages for dynamic breath hold imaging in liver and abdominal examinations.

See also Volume Imaging, 3 Dimensional Imaging.
 
Images, Movies, Sliders:
 Brain MRI Sagittal T1 001  Open this link in a new window
    
 Circle of Willis, Time of Flight, MIP  Open this link in a new window
    
SlidersSliders Overview

 MRI of the Skull Base  Open this link in a new window
    
SlidersSliders Overview

 
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• View the DATABASE results for 'Volumetric Imaging' (4).Open this link in a new window


• View the NEWS results for 'Volumetric Imaging' (1).Open this link in a new window.
 
Further Reading:
  Basics:
Cutting Edge Imaging of THE Spine
February 2007   by www.pubmedcentral.nih.gov    
3-D VOLUMETRIC IMAGING FOR STEREOTACTIC LESIONAL AND DEEP BRAIN STIMULATION SURGERY
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